GB2387340B - A system for and a method of estimating NOx content of exhaust gas produced by an internal combustion engine - Google Patents

A system for and a method of estimating NOx content of exhaust gas produced by an internal combustion engine

Info

Publication number
GB2387340B
GB2387340B GB0304145A GB0304145A GB2387340B GB 2387340 B GB2387340 B GB 2387340B GB 0304145 A GB0304145 A GB 0304145A GB 0304145 A GB0304145 A GB 0304145A GB 2387340 B GB2387340 B GB 2387340B
Authority
GB
United Kingdom
Prior art keywords
exhaust gas
combustion engine
internal combustion
gas produced
nox content
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
GB0304145A
Other versions
GB2387340A (en
GB0304145D0 (en
Inventor
John F Wright
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cummins Inc
Original Assignee
Cummins Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cummins Inc filed Critical Cummins Inc
Publication of GB0304145D0 publication Critical patent/GB0304145D0/en
Publication of GB2387340A publication Critical patent/GB2387340A/en
Application granted granted Critical
Publication of GB2387340B publication Critical patent/GB2387340B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
    • F02D41/1461—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases emitted by the engine
    • F02D41/1462—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases emitted by the engine with determination means using an estimation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/005—Electrical control of exhaust gas treating apparatus using models instead of sensors to determine operating characteristics of exhaust systems, e.g. calculating catalyst temperature instead of measuring it directly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/0065—Specific aspects of external EGR control
    • F02D41/0072—Estimating, calculating or determining the EGR rate, amount or flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/33—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage controlling the temperature of the recirculated gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/0406—Layout of the intake air cooling or coolant circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/45—Sensors specially adapted for EGR systems
    • F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
    • F02M26/47—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition the characteristics being temperatures, pressures or flow rates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
GB0304145A 2002-04-08 2003-02-24 A system for and a method of estimating NOx content of exhaust gas produced by an internal combustion engine Expired - Lifetime GB2387340B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/118,416 US6697729B2 (en) 2002-04-08 2002-04-08 System for estimating NOx content of exhaust gas produced by an internal combustion engine

Publications (3)

Publication Number Publication Date
GB0304145D0 GB0304145D0 (en) 2003-03-26
GB2387340A GB2387340A (en) 2003-10-15
GB2387340B true GB2387340B (en) 2004-06-30

Family

ID=22378451

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0304145A Expired - Lifetime GB2387340B (en) 2002-04-08 2003-02-24 A system for and a method of estimating NOx content of exhaust gas produced by an internal combustion engine

Country Status (3)

Country Link
US (1) US6697729B2 (en)
DE (1) DE10316062B4 (en)
GB (1) GB2387340B (en)

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10102914C1 (en) * 2001-01-23 2002-08-08 Siemens Ag Method for determining an estimated value of a mass flow in the intake tract of an internal combustion engine
US6681564B2 (en) * 2001-02-05 2004-01-27 Komatsu Ltd. Exhaust gas deNOx apparatus for engine
US6775623B2 (en) * 2002-10-11 2004-08-10 General Motors Corporation Real-time nitrogen oxides (NOx) estimation process
JP3900081B2 (en) * 2002-12-17 2007-04-04 トヨタ自動車株式会社 In-cylinder inflow exhaust gas amount calculation device for internal combustion engine and inflow exhaust gas amount calculation device for intake passage
US6817171B2 (en) * 2003-01-17 2004-11-16 Daimlerchrysler Corporation System and method for predicting concentration of undesirable exhaust emissions from an engine
JP4029739B2 (en) * 2003-02-05 2008-01-09 トヨタ自動車株式会社 Calculation of charge air quantity in internal combustion engine
JP3925485B2 (en) * 2003-11-06 2007-06-06 トヨタ自動車株式会社 NOx emission estimation method for internal combustion engine
US7246002B2 (en) 2003-11-20 2007-07-17 General Electric Company Method for controlling fuel splits to gas turbine combustor
US7067319B2 (en) * 2004-06-24 2006-06-27 Cummins, Inc. System for diagnosing reagent solution quality and emissions catalyst degradation
FR2876418A1 (en) * 2004-10-12 2006-04-14 Renault Sas Oxidant mixture intake method for e.g. Diesel engine, involves passing part of exhaust gas and part of air in gas-gas exchanger having air circuits connected respectively to recycling circuit and to air supply circuit
EP1693558A1 (en) * 2005-02-16 2006-08-23 ABB Technology AG Method of forecasting of pollutant emissions of combustion processes
US7725199B2 (en) * 2005-03-02 2010-05-25 Cummins Inc. Framework for generating model-based system control parameters
US8215098B2 (en) * 2005-05-02 2012-07-10 Cummins Inc. Method and apparatus for diagnosing exhaust gas aftertreatment component degradation
FR2909415B1 (en) * 2006-12-01 2009-02-13 Peugeot Citroen Automobiles Sa METHOD OF DETECTING THE USE OF A NON-CONFORMING FUEL
US7281518B1 (en) 2007-03-15 2007-10-16 Detroit Diesel Corporation Method and system of diesel engine setpoint compensation for transient operation of a heavy duty diesel engine
US7614231B2 (en) * 2007-04-09 2009-11-10 Detroit Diesel Corporation Method and system to operate diesel engine using real time six dimensional empirical diesel exhaust pressure model
DE102007036084A1 (en) * 2007-08-01 2009-02-05 Man Turbo Ag Method for determining emission values of a gas turbine and apparatus for carrying out the method
FR2919671B1 (en) * 2007-08-03 2009-10-30 Sphere Tech Europ Sarl METHOD FOR DIAGNOSING AN INTERNAL COMBUSTION ENGINE BY EXHAUST GAS ANALYSIS AND DEVICE FOR CARRYING OUT SAID METHOD
DE102007042086B4 (en) * 2007-09-05 2014-12-24 Continental Automotive Gmbh Test method for an exhaust gas probe of an internal combustion engine, in particular for a lambda probe
US7831378B2 (en) * 2007-10-30 2010-11-09 Cummins Inc. System and method for estimating NOx produced by an internal combustion engine
EP1983338A3 (en) * 2008-05-21 2008-10-29 StatoilHydro ASA Method for monitoring emissions of NOx from an emission source
AT504982B1 (en) 2008-06-12 2010-01-15 Avl List Gmbh METHOD FOR EVALUATING THE EMISSIONS OF A MULTI-CYLINDER INTERNAL COMBUSTION ENGINE
US8090456B2 (en) * 2008-11-03 2012-01-03 United Technologies Corporation System and method for design and control of engineering systems utilizing component-level dynamic mathematical model
US8108128B2 (en) * 2009-03-31 2012-01-31 Dresser, Inc. Controlling exhaust gas recirculation
DE102009036060A1 (en) 2009-08-04 2010-10-21 Daimler Ag Method for determining nitrogen oxide raw emission of vehicle internal combustion engine, involves selecting multiple engine operating parameters from quantity of engine operating parameters
US8668434B2 (en) * 2009-09-02 2014-03-11 United Technologies Corporation Robust flow parameter model for component-level dynamic turbine system control
US8315741B2 (en) * 2009-09-02 2012-11-20 United Technologies Corporation High fidelity integrated heat transfer and clearance in component-level dynamic turbine system control
LU91630B1 (en) 2009-12-14 2011-06-15 Spheretech Internat Diagnostic method for diesel engine
US8762026B2 (en) * 2010-08-24 2014-06-24 GM Global Technology Operations LLC System and method for determining engine exhaust composition
DE102011115364A1 (en) * 2010-10-19 2012-04-19 Alstom Technology Ltd. power plant
KR101234637B1 (en) * 2010-11-18 2013-02-19 현대자동차주식회사 METHOD FOR PREDICTING NOx AMOUNT AMD EXHAUST SYSTEM USING THE SAME
CN103748325B (en) * 2011-04-05 2017-03-15 卡明斯散发控制技术公司 For the system of after-treatment system monitoring, method and apparatus
US9062635B2 (en) * 2011-09-25 2015-06-23 Cummins Inc. System and method for estimating engine exhaust manifold operating parameters
EP2623753A3 (en) * 2012-01-31 2015-09-16 International Engine Intellectual Property Company, LLC NOx control
FR3012526B1 (en) * 2013-10-24 2015-10-30 Renault Sas SYSTEM AND METHOD FOR ESTIMATING THE FLOW OF NITROGEN OXIDES IN EXHAUST GASES OF AN INTERNAL COMBUSTION ENGINE FOR A MOTOR VEHICLE.
DE102014210841A1 (en) * 2014-06-06 2015-12-17 Robert Bosch Gmbh Method for determining a nitrogen oxide emission during operation of an internal combustion engine
US9453450B2 (en) * 2014-06-09 2016-09-27 GM Global Technology Operations LLC Method of estimating engine-out NOx mass flow rate
DE102015206135A1 (en) * 2015-04-07 2016-10-13 Robert Bosch Gmbh Determining nitrogen oxides in the exhaust gas of an internal combustion engine
US10221798B2 (en) * 2015-12-01 2019-03-05 Ge Global Sourcing Llc Method and systems for airflow control
US10920687B2 (en) 2016-11-15 2021-02-16 Cummins Inc. Spark ignition engine control with exhaust manifold pressure sensor
GB2580411B (en) * 2019-01-11 2021-09-15 Perkins Engines Co Ltd Method and system for determining an amount of a substance in exhaust gas of an internal combustion engine

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4188190A (en) 1976-03-23 1980-02-12 Kurashiki Boseki Kabushiki Kaisha Input control method and means for nitrogen oxide removal means
JP2586218B2 (en) * 1990-12-07 1997-02-26 トヨタ自動車株式会社 Control device for internal combustion engine
US5229090A (en) 1991-07-03 1993-07-20 Nalco Fuel Tech Process for nitrogen oxides reduction to lowest achievable level
US5303168A (en) 1991-10-31 1994-04-12 Ford Motor Company Engine operation to estimate and control exhaust catalytic converter temperature
US5386373A (en) 1993-08-05 1995-01-31 Pavilion Technologies, Inc. Virtual continuous emission monitoring system with sensor validation
US5539638A (en) 1993-08-05 1996-07-23 Pavilion Technologies, Inc. Virtual emissions monitor for automobile
JP2554836B2 (en) 1993-12-24 1996-11-20 株式会社東芝 Denitration control device
DE69530721T2 (en) * 1994-04-14 2004-03-18 Honda Giken Kogyo K.K. System for estimating the exhaust gas recirculation rate for an internal combustion engine
US6230683B1 (en) * 1997-08-22 2001-05-15 Cummins Engine Company, Inc. Premixed charge compression ignition engine with optimal combustion control
JP3510447B2 (en) 1997-03-19 2004-03-29 日本碍子株式会社 Gas concentration measurement method
US6236908B1 (en) 1997-05-07 2001-05-22 Ford Global Technologies, Inc. Virtual vehicle sensors based on neural networks trained using data generated by simulation models
DE19804361A1 (en) * 1998-02-04 1999-08-05 Siemens Ag Method of improving control quality of exhaust gas recirculation (EGR) controllers for internal combustion (IC) engines esp. diesel engines
US6035639A (en) * 1999-01-26 2000-03-14 Ford Global Technologies, Inc. Method of estimating mass airflow in turbocharged engines having exhaust gas recirculation
US6321157B1 (en) * 1999-04-27 2001-11-20 Ford Global Technologies, Inc. Hybrid modeling and control of disc engines
US6513484B1 (en) * 2000-03-03 2003-02-04 Ford Global Technologies, Inc. Boosted direct injection stratified charge gasoline engines
US6311679B1 (en) * 2000-05-02 2001-11-06 Ford Global Technologies, Inc. System and method of controlling air-charge in direct injection lean-burn engines
DE10043690A1 (en) * 2000-09-04 2002-03-14 Bosch Gmbh Robert Procedure for NOx mass flow determination from map data with variable air intake and engine temperature
US6401457B1 (en) * 2001-01-31 2002-06-11 Cummins, Inc. System for estimating turbocharger compressor outlet temperature
US6837227B2 (en) * 2001-01-31 2005-01-04 Cummins, Inc. System and method for estimating EGR mass flow and EGR fraction

Also Published As

Publication number Publication date
GB2387340A (en) 2003-10-15
GB0304145D0 (en) 2003-03-26
DE10316062B4 (en) 2010-09-09
US6697729B2 (en) 2004-02-24
DE10316062A1 (en) 2003-10-23
US20030191575A1 (en) 2003-10-09

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20230223